[clang] [Clang][AMDGPU] Add a new builtin type for buffer rsrc (PR #94830)

[Krzysztof Drewniak via cfe-commits]

krzysz00 wrote:

Just a note - and maybe this was already discussed above - is there good reason not to explicitly make this type  a 128-bit scalar? The LLVM data layout already does this

https://github.com/llvm/llvm-project/pull/94830